Quick-adjustment vise.



R. M SMITH.

QUICK ADJUSTMENT VISE APPLICATION FILED 1330.11.1907.

921 ,296, Patented May 11, 1909.

UNITE STAT QUICK-AD JUSTMENT VISE.

Specification of Letters Patent.

Patented May 11, 1909.

Application filed December 11, 1907. Serial No. 406,085.

To all whom it on my concern:

Be it known that I, R onnn'r M. SMITH, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Quick-Adjustment Vises, of which the following is a specification.

The object of this invention is a simple, durable and efficient construction of vise of that type which is designed for quick and accurate adjustment to the work, and the invention consists in certain constructions and arrangements of parts that I shall hereinafter fully describe and then point out the novel features thereof in the appended claim.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the accomp anying drawing, in which:

Figure 1 is a side elevation of my improved vise. Fig. 2 is a longitudinal section thereof with parts in elevation. F 1g. 3 1s a plan view. 1 1g. 4 1s a detail view 111 section showing the nut in raised position, and Fig. 5 is detail view in elevation showing the nut in an operative position.

(orresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

Referring to the drawing the numeral 1 designates the body portion of my improved vise, said body portion preferably consisting of a plate 2, a stationary jaw 8 formed at the front end of the plate and substantially perpendicular thereto, and a depending portion 4 formed at the rear end of said plate as shown.

An actuating screw 5 and two guide rods 6 spaced on opposite sides tirerefrom, are journaled for longitudinal movement in openings 7 which are formed correspondingly in the lower end of the stationary aw 3 and the deendin iortion 1. The screw 5 and the P n '2 guide rods 6 are designed to have their rear tee 11 formed with a transversely extending 23 on the tee 11.

aperture 12 designed for the reception of a handle or the like to turn said screw.

In order to adapt my vise for easy and quick adjustment, I have broken away the threads of the screw 5 to form a longitudinally extending groove 13, one side of which is abrupt and forms a shoulder 14, the other side preferably sloping g adually as shown. The plate 2 is broken away above the screw I to form the opening 15, and the guide lugs 16 are secured to the inner faces of the depending portion 4 and the stationary jaw 3 on opposite sides of the screw 5 and form channels which extend upwardly therefrom. A nut 17 is mounted at each end in the respective channels and is arranged for vertical movement therein, the lower face of said nut being formed with threads 18 engaging with the screw 5. The nut 17 is formed with a socket 19 communicating with its lower face, and a pin 20 extends through said socket and one end of a laterally-swinging tooth 21 and secures the latter in such socket, the free end of said tooth normally pointing in the opposite direction to the shoulder 14- of the screw and resting on the threads thereof.

In the practical operation of my improved vise, to effect a quick adjustment to the work, the screw is backed off until the free end of the tooth 21 drops into the groove 13. the continued turning of the screw resulting in the engagement of the shoulder with the tooth to rock the latter into substantially ver tical position and in the consequent raising of the nut 17 out of engagement with the screw. In such position the tooth 21 slides in the groove 13 and permits the quick longitudinal movement of the screw to accurately adjust the movable jaw to the work. The screw is then advanced which movement obviously causes the tooth to return to its former position and which also draws the jaws together to operativcly clutch the work.

It is obvious from the above description that after the vise is accurately adjusted to the work, one revolution of the screw in one direction or the other is all that is required in the operation of this improved vise, and as the engagement of the shoulder with the tooth limits the rotation of the screw in one direction, it may be desired to form a stop 22 projecting from the movable jaw 8 and a lug The lug 23 is designed to abut against the stop 22 to limit the rotation of the screw and also to prevent any further backing off of the screw after the nut has been raised since such movement would swing the tooth over past a line drawn through the centers of the screw 5 and pin 20, which would prevent the tooth from being returned to its normal position by the reverse movement of the screw, to rengage the nut therewith, and which would obviously result in the mashing of the threads 18 or other injury to the operative parts of the vise.

Having thus described the invention, what I claim is:

A vise of the character described comprisi ing a body portion, an actuating screw ournaled in the bod portion, a jaw operated by the screw, a disp aceable nut slidably mounted in the body portion and normally engaging with the screw, a tooth pivotally secured to said nut, means disposed on and controlled by the screw for engaging the tooth to turn the same about its pivot and displace the nut by and upon the turning of the screw in one direction, and means for limiting the rotation of line drawn through the center of the screw and the pivotal point of the tooth.

In testimony whereof I affix my signature in presence of two witnesses.

CHAS. E. GILBERT, EWALD E. LEI-IR. 

